Secret wireless



Oct. 27, 1925,y Y. A

P. B. DELANY SECRET WIRELESS FlOd Feb; l. 1922 www@ wenn( 1 l i applicano@ inegi reti-liars,

" ffaitizenxofthe Unitedfstats,1api airesirj f Qdeiitl ofgSouth/Or'ange, in the county oflEs- *i 5 seend State ofNe'w Jersey, haveinvented certain-new andjiiseful: lmprovements in f Se-` Lfull,clear,Y and'eXactdescription; v

QM-y invention has fo gits object the pretee-A 0 tinof radio,communications from''public ity ori intelligible interception by other s tafi n tions'than theorie for 'who'm the 'communi- 1 "cation is`intended and isfdesigned to pre-. y venti'ftappingvfbygany ofthe numerous 'amateuriandj'commercialstations now .in eXp-1' i jgisten'ce'; v i 1 v"jlhe system is basedzupon theuse'of difj vr ferent Wavelengths for v''cliaracteris'tics for cl0ts' and VVdashes or'their componentv parts, V 20 andllfiiigthe"case of'f Wireless 'telephony the (disintegration *ofr syllables, Words 'or other liavev'to be :discoipferedv and /us'e'd jointly in 0f oonnectiony'vith two" receivers. i

f For receivingy messages thus transmitted tvvo recorders may loe-.used marking side by siolel on a single tape, or inthe case of'tele' phonicreception7 two separate headfrec'eiyf ers one for each ea-r and each tune'dto oneV i lengtho'f Wave. f Y l Other objects of my inventionr Will be' apparent from thev following'description and U 'the appendedl claims. x i f y Y In the drawings, Whichare mainlyY dias '7' f g'rarnmaticzr` f' 'f `Figure lis .fi-conventional representationl 'of aV telegraphio sending station, and: Figure'Q `a similar view gof the receiving station therefor employing 'two ,recording llingers.

l `uizhichfis'to be substituted for thetelegraplr 4 key in-Figiire l, and lFigure t shows the fre- 'L y 'Y 'ceivingv station corresponding.therevvithiKV 5.0i Figure y5 illustrates'ja slightly` diii'erent Yform of apparatusinV VWhich two. sendingl keys may beused, and Figure 6 s howsthe' lfil'form' of receiver Which Vmay be used either fforjvisua'l or' auditory reception ofthe mes- Piliexiled0 f.f27.1925,5-LV 4. ,i

fashion e.fnEnANYgorfsournoniiiven, MENTS, To rNrERNATIoiwin@surestej coiviriinv, A` conronii'rijoivf ori-@ELA- if siioniir WIRELESS."

cretWireless', of vvliich'ithe f following is4 Va F igure'B indicates a telephone-transmitter `issie- Inl' the form Of transmitting' i a-lljai-tus disclosediin Figure f1 atelegraph key and i i battery 2.areconnectedpthrough afro 'ary -f i rWaves of'frttvo'f: different 'leng'tlisQsaidmeans'i ments and as it rotatesthe 'signals' sent'rby'rv the; key l' are sentfalternately asi/a ivhole or? 'ini part over (one `fortheFfother'ofthe interi#Vr switch. 3y alternately to lineans for send-ing' `6() i comprisingV sparkfgaps 47j and l5,l eondeifsersj *Y l V6 and 65 .and aerial ;7 grounded at 81'*Th er vrotary switch is show nfashaving four seg# that the operation ofthe key shall rcause the emission of Waves of one` character or of another according to 'the position ofthe f switch or other regulating ing the operation thereof:

" IThe receiving station conventionally;illustrated `in Figure 2'v must'have means Qjfand 10.1respectively," or :equivalentfmeans of1selectivity for-receiving' thefvvaves ofthe dif-jV ferentecharactersfjor lengths employedf `n f transmission, and they vare coynnelote'd tof re-"V V'cording fingers 12 andfl resting ontheffu al tape carried v.by 'adrum 11,`a .cliemical corder .beingl preferred.`

The portions ofthe 'message Sentgo on one Wavelength Will bev received by there-'v ceivingrmeans 9 andrecorded through the. 'linger 12, While the portions sentout'byfthe lother Wave length Willbe received bythe rrei ceivingmeanslO vandiecordccl byltliegfinf ger 13, i- These'recordsA are sidebyvside"andV can be easily read.

If '-itis desired to transmit soundsucl'i-aslff' speech or music, a. telephone transmitter 14 is.- substituted for thekeyl of,-Figure1,

and the operationatthesendingfstationis ff the same as inthe first case. The4 receiving station asshown in Figure l*hastwoftelephone receivers 15 and 1 6Y `carried *byfonef headpiece and substituted forthe recording j t- Since a portion fingers of the first form. of the signals Willbe received throughone ear'and the remainder throughthe other7 and always in the same order in Which they message 'were sent, it is obvious that the will be readily understood.v

- This form of receiver may also be used" instead of the recorder shown in Figure 2 for thereception of telegrapliicY messages., i i

A 'still further arrangement'is illiistrated 'in Figures 5 and 6. Here two keys 17 and 18 are employed, one for dots and the other for Vdashes' andthe rotary switch is omitted. The receiving station shown in Figure 6 may include the recorder of Figure 2 and the telephone receiver of Fig. 4, aswitch 19 being employed to close circuits through contacts 2O or 21 according to whether visual or, auditory reception of the messages is desired. i

' It "s, obvious that many modifications may lie made withinv the scope of my invention1 and the illustrations. are merely diagrammatic. @theiforins ofswitch may be used instead of, the rotary one conventionally illustrated.j Any general type of apparatus, wave generatorsor modifiers may be employed so longi as they conform to the description given and accordV with the appendedclaims. v

I claimy as .my invention :y

1. A secretl radio'V system, comprising in combination atfthe transmitter meansY for radiating waves; of diering frequencies having fragiiientaryl and. iiiutilatedv portions ofl the signalsv tci1 be transmitted superimposedon either'one'or. another of said-differing frequencies., at: tliereceiver a `plurality of circuits*arranged-t0 respond to said differingk frequencies,I means.v for producing a `visible and. audible'record of each of said fragmentary an'dyinutilated portions of the transmitted signalson each of said differingfreqiiencies, said visible record means comprising a recorder, with separate means ciperableside by side, and eacli'coperative by fragnientaryand mutilated.' portions of said signals on different frequencies whereby saidV signals maybe visibly and audiblycoinbined fors'ecu'ring an intelligible record at the receiver.

2; A system for receiving radio signals in which fraginentary` and. mutilated. `portions of the signals are transmitted secretly on a lplurality of different frequencies, comprising in coinbination a plurality of receiving circuits each responsive to one of the signaling frequencies, visible recordery connected with said circuits, said visible recorder comprising a` tape and a` plurality ofv signal recording means coizrespondingv in number to the number of transmitted frequencies,u each operable side by side adjacent-'said tape and each operative by fragmentary and` mutilated portions of said signals on different frequenciesv wliereby/ said signals may be combined and visibly reproduced on said recorderfor securing .anintelligent record ofthe transmitted signals.

BLA systemfor receiving radio signals in which fragmentary and mutilated portions of the signals are transmittedsecretly on a plurality of different frequencies, comprising in combination a plurality of. receiving circuits each responsive to oneof'the signal.- ing` frequencies, a recordireceiving device connected with said circuits, saidV device comprising a Vplurality of receiving means corresponding in number. to the number of transmitted Jfrequencies each operative by fragmentary and mutilated'portions of said signals on dierent frequencies whereby said signalsY may-be combined to secure an intelligent record of the transmitted signals.

In testimony, whereof I have `hereunto subscribed my name.

VPATRICK B. DELANY. 

